At first it sounds like she was letting him walk all over her, or that she was desperate to keep him. But in actuality, she recognized a conflict, and she took the perceived best course of action so that she could acheive victory. Victory, in this case, was not allowing her husband to leave her family, and to a lesser extent, allowing him to draw her into an ongoing argument over divorce.

At the most basic level, you can ask yourself what your enemy (uke/husband) wants you to do, and then simply don't do that thing. The husband wanted her to fly off the deep end and give him a reason to leave. While I'm sure she felt the urge to flip out, and she would've been right in doing so, she instead chose to defeat her enemy with a more effective tactic.